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Note 15 - Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of Defined Contribution Plan [Table Text Block] |
Pension |  | Pension Plan Employer Identification |  | Pension Protection Act (“PPA”) Certified Zone Status1 |  | FIP / RP Status Pending |  | Contributions |  | Surcharge |  | Expiration Date of Collective Bargaining
Trust Fund |  | Number |  | 2012 |  | 2011 |  | / Implemented2 |  | 2012 |  |  | 2011 |  |  | 2010 |  | Imposed |  | Agreement3
Pension Trust Fund for Operating Engineers Pension Plan |  |  | 94-6090764 |  | Orange |  | Orange |  | Yes |  | $ | 508 |  |  | $ | 246 |  |  | $ | 193 |  | No |  | 6/30/2008 - 6/30/2014
Operating Engineers Local 428 Pension Trust Fund |  |  | 86-6025732 |  | Yellow |  | Yellow |  | Yes |  |  | 560 |  |  |  | 121 |  |  |  | -- |  | No |  | 1/1/2012 - 5/31/2013
Laborers Pension Trust for Northern California |  |  | 94-6277608 |  | Yellow |  | Yellow |  | Yes |  |  | 431 |  |  |  | 64 |  |  |  | -- |  | No |  | N/A5
Cement Mason Pension Trust Fund For Northern California |  |  | 94-6277669 |  | Yellow |  | Yellow |  | Yes |  |  | 265 |  |  |  | 46 |  |  |  | -- |  | No |  | 6/16/09 - 6/15/13
All other funds (41)4 |  |  |  |  |  |  |  |  |  |  |  | 3,777 |  |  |  | 2,065 |  |  |  | 1,307 |  |  |  | Various
Total Contributions: |  |  |  |  |  |  |  |  | $ | 5,541 |  |  | $ | 2,542 |  |  | $ | 1,500 |  |  |  |

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- Definition Schedule of Defined Contribution Plan [Table Text Block] + References No definition available. + Details
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Namespace Prefix: | strl_
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Balance Type: | na
Period Type: | duration